Speculate on why it can be problematic to copy and express genes from Bacteria into Eukarya
What will be an ideal response?
Answer: Transcription in Bacteria is quite different than transcription in Eukarya. Different promoter sequences and RNA polymerases are used. In addition, mRNA in Eukarya must be tagged and modified so that it can be exported from the nucleus for subsequent translation. The promoter sequence and other signal sequences would have to be added to the Bacterial gene so that it would be properly transcribed. Another issue is that the universal genetic code does have exceptions. This means some mRNA could be translated into different proteins in different cells or not terminated at the correct location. Codon bias is another problem that can influence translational efficiency. The machinery and methods of post-translational modification are also very different and can therefore make cloning between Bacteria and Eukarya difficult.
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Which of the letters in the genetic code are
most important for the translation of many amino acids?
a. the first one b. the first two c. the last two d. the last one e. all three are equally important for all amino acids
Depression and an overwhelming desire to sleep are associated with
a. diabetes mellitus. b. diabetes insipidus. c. hyperthyroidism. d. seasonal affective disorder. e. a goiter.
What is the most common source of saturated fats?
a. fish b. animal products c. deaf-leaf vegetables c. cereal grains
atomic number
What will be an ideal response?